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Bristol Medium  

Directions 
H.C. Bold's modification of Bristol's recipe (Bold 1949). General purpose freshwater medium and as bristol's solution, an essential component of other media--see Bold 1NV, Bold 3N, Bristol-NaCl, LDM, Proteose, Soil extract, and Trebouxia.

For 1 L Total
1. To approximately 900 mL of dH2O add each of the components in the order specified while stirring continuously.
2. Bring total volume to 1 L with dH2O.
*For 1.5% agar medium add 15 g of agar into the flask; do not mix.
3. Cover and autoclave medium.
4. Store at refrigerator temperature.

  
#ComponentAmountStock Solution
Concentration
Final Concentration
1NaNO3 (Fisher BP360-500)10 mL/L10 g/400mL dH2O2.94 mM
2CaCl2·2H2O (Sigma C-3881)10 mL/L1 g/400mL dH2O0.17 mM
3MgSO4·7H2O (Sigma 230391)10 mL/L3 g/400mL dH2O0.3 mM
4K2HPO4 (Sigma P 3786)10 mL/L3 g/400mL dH2O0.43 mM
5KH2PO4 (Sigma P 0662)10 mL/L7 g/400mL dH2O1.29 mM
6NaCl (Fisher S271-500)10 mL/L1 g/400mL dH2O0.43 mM

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